Sand and water feeding mechanism for stone sawing or rubbing machines



(No Model.) 2 Sheets-Sheet 1.

E. J. HAWLEY. sAEE AND WATER FEEDING MECHANISM FOR STONE EAWIEE 0E RUBBING MACHINES.

No. 821,293. Patented June 30, 1885..

3 fl-H'o'mwL W. Mfg 444 W Z/W M. PETERS, Phckn-Llihagrapl'er, Wnlungton. 11c.

(No Model.) 2 Sheets-Sheet 2.

E. J. HAWLEY. SAND AND WATER FEEDING MECHANISM FOR STONE SAWING OR RUBBING MACHINES.

No. 321,298. Patented June 30, 1885.

@vbbmao-deo Moan/kw 1 abbomeq FNITED STATES PATENT @rrrcn.

. ELI J. HAWVLEY, OF MANCHESTER, VERMONT.

SAND AND WATER FEEDING MECHANISM FOR STONE SAWING 0R RUBBING MACHINES.

SPECIPICATIQN forming part ofLetterB Patent No. 321,293, dated June 30, 1885.

Application filed May 5, 1885. (No model.)

To aZZ whom it may concern:

Be it known that I, ELI J. HAWLEY, a citizen of the United States, residing at Manchester, in the county of Bennington and State of Vermont, have invented certain new and useful Improvements in Sand and Water Feeding Mechanisms for Stone Sawing or Rubbing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in sand and water feeding mechanisms for use in connection with stone sawing or rubbing machines.

The objectof my invention is to supply mixed sand and water to the saws or rubbing bed, and, after having served its purpose on the stone, to return it to the tank from whence it was taken, to be freed from the unserviceable portion, and to use again such as remains in a serviceable state. This I do by mechanism cheaper and simpler in construction and easier operated than other mechanisms now used for a similar purpose.

Referring to the accompanying drawings, Figure 1 is a perspective view of my improved sand and water feeding mechanism in which avertical centrifugal pump is employed. Fig. 2 shows a horizontal centrifugal pump and its connections with the other parts of my invention.

Similar letters of reference indicate corresponding parts in both figures.

A represents a tank for containing water and sand.

B, in Fig. 1, is a vertical centrifugal pump, locatedin tank Aand supported slightly above the bottom of the tank by legs b.

Connected with the pump is a pipe, C, leading to a reservoir D. The reservoir is located above the plane of the gang-frame, as shown, and is supplied with mixed water and sand from tank A by means of the pump, which forces it thereto through pipe 0. Connected with the reservoir, at or near its top, is an overflow-pipe, 0, leading downward into tank A, which serves to convey back into said tank any surplus of sand and water.

From the reservoir a pipe, E, provided with a cock, 6, leads to a distributing box, F,

mounted on a gang-frame, G. The bottom of this box is perforated, and by this means serves to distribute over the stone being worked the mingled sand and water drawn from the reservoir.

-I have represented but one gang-frame, as this is deemed suflicient to illustrate the principles of my invention; but it is evident I may use a number of such gangs, and, indeed, I prefer to do so-say from six to ten. These gangs are all to be supplied with water and sand from the reservoir in the manner explained, and in case the full number of gangs arenot in operation the supply to the reservoir will probablybe greater than the demand, in which case all surplus will flow back to tank A through overfiow'pipe C. After the sand and water have performed their ofiiee upon the stone, they, together with the mud formed in grinding, are drained from the bed of the gang-frame and carried by a trough, H, to tank A. In this tank the action of the water upon the sand and mud is such that it separates the good unworn sand from the mud and spent sand, the good sand settling to the bottom of the tank to be used over again, while the mud and spent sand pass off through an overflowopening near the top of the tank.

In order to supply tank A with clear water, I locate a tank, I, to one side of and some distance above reservoir D, as shown in Fig. 1. With this latter tank I connect a pipe, K, having cock 75, which may lead directly to the bottom of tank A; but, by preference, I counect it with pipe 0 in communication with the pump. By this construction the force of the water flowing through pipes K and G into and through the pump will cleanse the latter of all mud and other deleterious substances which may have worked into it.

A short distance from tank A, and a little above it, there is a sand-box, L, for containing fresh sand. Water is supplied to this box by a pipe, M, provided with a cock, on, connected with pipe K. Leading from the sand-box to tank A is a pipe or trough, N, for conveying mixed sand and water from the former to the latter. Over that end of this pipe which enters the sand-box is a screen (not shown) for the purpose of preventing the passage of gravel, 820.

So far the description has contemplated the use of a vertical centrifugal pump; butit will be at once apparent to any machinist that a horizontal pump can be readily substituted. In Fig. 2 I have shown how this may be done.

As shown in Fig. 2, a horizontal pump is set on the floor of the mill, and tank A and sandbox L are placed under the floor. WVater and sand are taken from tank A by a suction-pipe, 0, connected with the pump, drawn through the latter, and discharged through pipe 0 into the reservoir.

Various styles of pumps have heretofore been used for delivering sand and water to the distributing-reservoir in this class of machines, but none of them, to my knowledge, has ever been successfully used. The sand, owing to its gritty nature, has had the effect to destroy the valves in a very short time, and expense and delay on this account have been obstacles with which quarrymen have been compelled to contend until a better means could be devised; but the destruction of the valves is not the only objection to be urged against the use of those pumps, for they not only fail to thoroughly commingle the sand and water in the tank prior to delivery, but a portion of the sand taken up finds lodgment in parts of the pump, which, after a short run, becomes clogged.

By the use of a centrifugal pump I have overcome all of the above objections. The pistons, by their centrifugal motion, have a tendency to violently agitate the contents of the tank, and also to drive through the exitpipe all the sand taken up, and, owing to the absence of valves inside the pump, the sand has but little destructive effect upon it. If,

by reason of the pump standing idle some time, sediment should gather around the pistons, it will all be washed out when water from the fresh-water tank is turned on prior to starting the machine.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An apparatus for supplying sand and water to stone sawing or rubbing machines, consisting of a tank for containing sand and water, a centrifugal pump in communication with said tank, a discharge-pipe connected with said pump, a reservoir located on a plane above the machine with which the discharge pipe is connected, and means, substantially as described, for conveying the mingled sand and water from the reservoir to the stone being worked, as specified.

2. An apparatus for supplying sand and water to stone sawing or rubbing machines, consisting of a tank for containing sand and water, a centrifugal pump placed in said tank, a reservoir located above the plane of the 1nachine, a pipe connected with the pump and leading to the reservoir to convey thereto mingled sand and water from the tank, and means, substantially as described, for conveying the sand and water from the reservoir to the stone being worked, as and for the purpose set forth. j

3. In an apparatus for supplying sand and water to stone sawing or rubbing machines, a tank for containing sand and water, a centrifugal pump in communication with said tank, a reservoir located above the plane of the ma chine, a discharge-pipe connected with the pump and leading to the reservoir, a watertank located on ahigher plane than the reservoir, and a pipe connected with the watertank and tappedv into the discharge-pipe for supplying the sand-and-water tank with water, and at the same time cleansing the pump, substantially as described.

In testimony whereof I affiX my signature in presence of two witnesses.

F. I. BARNES, H. A. HALL. 

